Re: [Qgis-user] How to create a QGIS grid but not the usual way

[Thayer Young]

 Hi John,
You may want to start by using the QuickMapServices plugin to add a basemap 
like OpenStreetMap. I suggest OSM because it tends to have administrative 
boundaries like counties. To make sure that everything is lining up correctly.
Then with your extent polygon:You can turn snapping on so that the measure tool 
snaps to the corners of your extent polygon.  View: Toolbars: Snapping Toolbar  
<-- make sure that this is checked.Then click on the "Enable Snapping" icon, 
which looks like a red horseshoe magnet with white tips (you can also just 
press the S key).Then, click on your Extent layer to make it the active layer 
in the layer panel. Then set the other icons to the right of Enable Snapping as 
follows: "Active Layer", "Vertex", "6", "px"  
You should then see that your cursor for the measure tool changes to a magenta 
square when you hover over the corners (the vertices) of your extent polygon.
You may need to reproject or define your projection:It sounds like you probably 
have an extent that is in state plane, QGIS often has problems recognizing 
state plane projections. You can try to export your extent to a projection that 
QGIS understands, for example NAD83 UTM zone 17N or 18N depending on where your 
county is in North Carolina. Otherwise try the set projection tool.
Right click on the extent layer, left click Export then left click Save 
Features As. In the dialog you can set the projection.  
-Thayer

Date: Sat, 15 May 2021 12:05:53 + (UTC)
From: John Antkowiak 
To: "qgis-user@lists.osgeo.org" 
Subject: [Qgis-user] How to create a QGIS grid but not the usual way
Message-ID: <1021879306.860570.1621080353...@mail.yahoo.com>
Content-Type: text/plain; charset="utf-8"

Hi. I'm new to QGIS. I've been up all night reviewing the Training Manual and 
watching tutorial videos looking for someone to address my situation. I'm 
overtired and I'm sure I'm missing something obvious.
I'm trying to create a large-format paper wall map to show all the roads in my 
county, and I have to create an atlas to do it.
For sake of this question, let's assume the county is approximately 19 miles 
east-west and approximately 28 miles north-south. The key word here is 
approximately - and I suspect this task requires precision that I don't know 
how to find.?
All the lessons for creating grids from which the atlas will be generated 
instruct me to do it the same way: specify the desired horizontal and vertical 
intervals. That's not what I want.
What I want is to divide the extent by three, whatever interval that happens to 
be. And I can't figure out precisely the total dimension, in miles, of the map 
extent. In case this is relevant: the data layers are projected in?NAD83 / 
North Carolina (ftUS) but the QGIS GUI at the bottom right says "Unknown CRS."?
I created a layer for this exercise - don't ask me to explain how I did it - 
whose only feature is a rectangle covering the area to be divided. This layer I 
call "Extent."
I try to use the Measure tool to get the exact east-west distance of the 
polygon. BUT. I have to manually select the start and end points, and I have no 
confidence that the points I'm selecting precisely match the limits of the 
polygon because when I measure the north and south horizontal lines, I get two 
different values. It's a rectangle. The values ought to be the same.
Am I going bout this all wrong? How do I create this 3 x 3 grid?
Thanks -?
John A.
-- next part --
An HTML attachment was scrubbed...
URL: 
<http://lists.osgeo.org/pipermail/qgis-user/attachments/20210515/0731c969/attachment-0001.html>


  ___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

[Qgis-user] How to create a QGIS grid but not the usual way

[John Antkowiak]

Hi. I'm new to QGIS. I've been up all night reviewing the Training Manual and 
watching tutorial videos looking for someone to address my situation. I'm 
overtired and I'm sure I'm missing something obvious.
I'm trying to create a large-format paper wall map to show all the roads in my 
county, and I have to create an atlas to do it.
For sake of this question, let's assume the county is approximately 19 miles 
east-west and approximately 28 miles north-south. The key word here is 
approximately - and I suspect this task requires precision that I don't know 
how to find. 
All the lessons for creating grids from which the atlas will be generated 
instruct me to do it the same way: specify the desired horizontal and vertical 
intervals. That's not what I want.
What I want is to divide the extent by three, whatever interval that happens to 
be. And I can't figure out precisely the total dimension, in miles, of the map 
extent. In case this is relevant: the data layers are projected in NAD83 / 
North Carolina (ftUS) but the QGIS GUI at the bottom right says "Unknown CRS." 
I created a layer for this exercise - don't ask me to explain how I did it - 
whose only feature is a rectangle covering the area to be divided. This layer I 
call "Extent."
I try to use the Measure tool to get the exact east-west distance of the 
polygon. BUT. I have to manually select the start and end points, and I have no 
confidence that the points I'm selecting precisely match the limits of the 
polygon because when I measure the north and south horizontal lines, I get two 
different values. It's a rectangle. The values ought to be the same.
Am I going bout this all wrong? How do I create this 3 x 3 grid?
Thanks - 
John A.___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

[Qgis-user] (no subject)

[ruyedy]

--
Enviado do aplicativo myMail para Android___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

Re: [Qgis-user] QGIS file version control

[Greg Troxel]

Richard Duivenvoorde  writes:

> On 5/14/21 8:50 PM, Alexandre Neto wrote:
>> Hi Hugh,
>> 
>> Check this plugin to make you qgs files more trackable:
>> 
>> https://plugins.qgis.org/plugins/trackable_project_files/ 
>> 
>
> THAT was exactly my experience when I recently put a projectfile on
> github to be able to easily share the styling of a big set of
> (national) geopackages [0]: the order of the attributes are totally
> unpredictable in standard QGIS: without changing anything, resaving a
> project, you get A LOT of 'edits' in your files.
>
> Apparently this plugin has a solution for it (only looked to the description):
> "Orders attributes in .qgs project files in a predictable order. This helps 
> tracking QGIS project files in versioning systems like git."
>
> It would be good to pull this into QGIS in my view, would that be easy?
>
> Regards,
>
> Richard Duivenvoorde

Do you mean:

  It's a bug that qgis can save a project that is semantically equal in
  textually different forms with reordering.

  This plugin addresses that bug.

  [implicitly, there's no reason to want arbitrary/variable ordering]

  Therefore the plugin should just be folded in and be the normal
  behavior?

That's how I see it, but I'm still newish so I may be missing something.


signature.asc
Description: PGP signature
___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

Re: [Qgis-user] QGIS file version control

[Richard Duivenvoorde]

On 5/15/21 12:01 PM, Richard Duivenvoorde wrote:

> Apparently this plugin has a solution for it (only looked to the description):
> "Orders attributes in .qgs project files in a predictable order. This helps 
> tracking QGIS project files in versioning systems like git."

Mmm, does partially work in my tests here, with this project

https://github.com/rduivenvoorde/QGIS_top10nl_style

 some parts are still changing (I only zoomed/panned in between saves).

https://github.com/rduivenvoorde/QGIS_top10nl_style/commits/master/top10nlv2.qgs

For this project I specially saved the project to a .qgs file so I hoped it 
would be easier to track if others did some changes/pull requests in the 
styling (an old Dutch standard map styling).

Note: to be able to use the project, you have to download a 2,5Gb zip with 
geopackages from
https://service.pdok.nl/kadaster/top10nl/atom/v1_0/top10nl.xml
and unzip them in the data dir of the repo.
And you also need some fonts... 

Regards,

Richard Duivenvoorde



___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

Re: [Qgis-user] QGIS file version control

[Richard Duivenvoorde]

On 5/14/21 8:50 PM, Alexandre Neto wrote:
> Hi Hugh,
> 
> Check this plugin to make you qgs files more trackable:
> 
> https://plugins.qgis.org/plugins/trackable_project_files/ 
> 

THAT was exactly my experience when I recently put a projectfile on github to 
be able to easily share the styling of a big set of (national) geopackages [0]: 
the order of the attributes are totally unpredictable in standard QGIS: without 
changing anything, resaving a project, you get A LOT of 'edits' in your files.

Apparently this plugin has a solution for it (only looked to the description):
"Orders attributes in .qgs project files in a predictable order. This helps 
tracking QGIS project files in versioning systems like git."

It would be good to pull this into QGIS in my view, would that be easy?

Regards,

Richard Duivenvoorde

[0] https://github.com/rduivenvoorde/QGIS_top10nl_style
___
Qgis-user mailing list
Qgis-user@lists.osgeo.org
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user